Dell Optiplex 760 + XLite Audio Distortion
Recently an issue came up at work with some brand new Dell Optiplex 760 systems. We are currently testing out Asterisk as a replacement to our current Toshiba phone system. We chose Xlite as our client of choice, because its free and has great call quality. We successfully deployed several copies on existing machines, but ran into problems on some of the newer systems. We experienced a strange techno-y distorition with beats and pops. All other Windows sounds work perfect, but as soon as you get into Xlite and click a button to dial you can hear the distortion, and it is most prevalent during a phone call. After trying out a PCI sound card we got clear phone calls once again. Rather angry that our brand new Dell’s were shipping with faulty sound chips or something of that nature we called up technical support. After a few hours on the phone the tech came across a side note mentioning a power save setting in the BIOS. At this point I wasn’t sure what could hurt trying to find the solution. Sure enough the C-STATE power setting in the BIOS was the culprit. I have tested the latest A05 and A03 BIOS versions successfully. The setting is under the Performance menu, C-STATE > there’s only one checkbox under there, disable it and you’re golden.
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